FREEPBX-8265 add support for invalid and timeout dests to return to the previous IVR.  This was possible in 2.9 when specifying i and t destinations manually, but did not survive the i and t dests moving into the ivr_details table
FREEPBX-8265 Timeout and Invalid destinations can no longer return to calling IVR
[Module Tag script: ivr 2.11.0.7]
FREEPBX-8265 Allow checkboxes to be selected and check for proper input
Merge branch 'release/2.11' into release/13.0

Conflicts:
	functions.inc.php